问题描述

MainActivity中的setListAdapter

嘿，MainActivity中onPostExecute(string result)方法爆出了一个错误：

"The method setListAdapter(CustomAdapter) is undefined for the type MainActivity.getTweets"

MainActivity.java

public class Main Activity extends Activity {
    ArrayList<TweetDetailClass> tweets = new ArrayList<TweetDetailClass>();

    protected void onCreate(Bundle savedInstanceState) { .. }

    public boolean onCreateOptionsMenu(Menu menu) { .. }

    public void searchTwitter(View view){
        ...
        new GetTweets().execute(searchURL);
    }

    public class GetTweets extends AsyncTask<String, Void, String>{
        protected String doInBackground(String... twitterURL){ .. }
        protected void onPostExecute(String result) {
             setListAdapter(new CustomAdapter(MainActivity.this, R.layout.listview, tweets));
        }
    }
}

CustomAdapter Constructor 中的代码如下：

CustomAdapter(Context c, int textView, ArrayList<TweetDetailClass> data){
    //_data = data;
    //_c = c;
    super(c, textView, data);
    this._data = data;
}

解决方案

setListAdapter()只有在Activity 继承ListActivity时才能用。你的xml布局文件肯定包含ListView 对象，id是 "@android:id/list"。

如果满足继承条件的话，可以这样

yourListView.setAdapter(new CustomAdapter(MainActivity.this, R.layout.listview, tweets));